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One of my first ...

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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One of my first ...

Unread postAuthor: tape fist » Fri Feb 13, 2009 2:43 am

This is one of my first pneumatic cannons I've made, I tried to build on a budget and ended up spending a reasonable amount of twenty-two dollars. The stock is made fully out of 3/4 in. sch 40 PVC pipe and fittings with a pressure gauge and threaded valve stem.The firing system is a rainbird cp-100 1 in. modded sprinkler valve that is pressure rated for 120 psi.This pneumatic cannon has two detectable barrels,one with a .40 caliber barrel sleeved in a 1/2 in. PVC pipe with a breach loading system the other is a regular 3/4 inch barrel that's about 4 feet long.some of the ammo i use is .40 blowgun dart,triple a batteries,nails,and homemade scatter shots either filled with airsoft bbs or 5 marbles.


Fully assembled air cannon
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Modded sprinkler valve
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breach loading system locked
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breach opened
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stock/air chamber
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Some damage shots!!
This was shot with a penny slug about twice.
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shot a dart from about 5 feet at a penny taped to half inch plywood.
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Pepsi can filled with water inside a soup can inside a tomato sauce can that was shot with a metal marble.
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Last edited by tape fist on Fri Feb 13, 2009 3:09 am, edited 2 times in total.

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Unread postAuthor: Ragnarok » Fri Feb 13, 2009 2:59 am

Nice - apart from the fact that the pressure gauge should ideally have been threaded in at a joint. And the fact that it's a 400 psi gauge is optimistic too...

However, apart from that, it looks good. Are you left handed by any chance?
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: tape fist » Fri Feb 13, 2009 3:00 am

picked it up at a swap meet for 50 cents. :)

Na im right handed. I hold the blowgun on the stock while i support it with my left hand which i place next to the stem valve,it`s actually really comfortable.
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Unread postAuthor: Ragnarok » Fri Feb 13, 2009 3:36 am

Okay. I just saw a left handed breech handle, so I thought I'd ask.

Fair enough on the gauge thing - just don't get optimistic...
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Unread postAuthor: inonickname » Fri Feb 13, 2009 3:51 am

Nice and clean, great work! Next time try tap the gauge in on a double layer of pvc (such as a joint).
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Unread postAuthor: tape fist » Fri Feb 13, 2009 3:59 am

i have a nut inside the pipe that's screwed on to the gauge and it hasn't leaked so far but next time ill try to go for a joint piece.

Fair enough on the gauge thing - just don't get optimistic...


I know plus i wouldn't even be able to get up that high or the diaphragm of the sprinkler valve would rupture and there goes my 15 dollars. :)
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Unread postAuthor: psycix » Fri Feb 13, 2009 7:38 pm

Very nice! Clean build.
Does the breech leak some air on firing?
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Unread postAuthor: XxtriviumxX » Fri Feb 13, 2009 9:48 pm

Very Nice :D ... Good clean build and nice breech load system, though you should cut out some of that pilot volume.
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Unread postAuthor: tape fist » Fri Feb 13, 2009 10:28 pm

Very nice! Clean build.
Does the breech leak some air on firing?


no,I added an o-ring so that it wouldn't.
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Unread postAuthor: jon_89 » Fri Feb 13, 2009 11:34 pm

It is amazing what a blow gun dart can do at 120psi huh. I used a stun dart at 200psi before and it went through the milk jug and the my fence. :shock:
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Unread postAuthor: tape fist » Fri Feb 13, 2009 11:38 pm

It is amazing what a blow gun dart can do at 120psi huh. I used a stun dart at 200psi before and it went through the milk jug and the my fence. Shocked


ya, but there useless after wards,i got 400 for 20 dollars what about you?
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Unread postAuthor: jon_89 » Fri Feb 13, 2009 11:59 pm

Yeah I cant remember how much they were. I like to shoot mine at drywall at really low pressure because it slides easily in an out. (thats what she likes. sorry couldnt resist)
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Unread postAuthor: tape fist » Sat Feb 14, 2009 12:04 am

Yeah I cant remember how much they were. I like to shoot mine at drywall at really low pressure because it slides easily in an out. (thats what she likes. sorry couldnt resist)


lol i almost didn't get that, I guess that's what happens if you haven't slept in 2 days.
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Unread postAuthor: starman » Sat Feb 14, 2009 4:32 am

This is a neat build tape! As an upgrade, you could consider going to a quick connect instead of the schrader. Also, this would nicely operate with a reg'd CO2 setup...make it much more portable.
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Unread postAuthor: tape fist » Sat Feb 14, 2009 4:36 am

ya, my uncles giving me a air tank that he uses to feel up his jeep tires after four wheeling. I don't know if ill use it for this gun though.
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